# Math Help - line passing through

1. ## line passing through

Line passing through (-4,7) and (1,-3)

2. Use the 2 point formula:

$\frac {y-y_{1}}{x-x_{1}} = \frac {y_{2}-y_{1}}{x_{2}-x_{1}}$

3. does it matter where i put the numbers

4. Originally Posted by alysha230893
does it matter where i put the numbers
No, it does not as long as it follows the rule.
Say you subbed $y_2$ with 7
$y_2$
Then the numerator must be $x_2$ from the same point you subbed $y_2$ first, in this case, it has to be -4.

Regardless which way you put which points in first, you will always get the same answer.

$\frac{7--3}{-4-1}=-2$

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$\frac{-3-7}{1--4}=-2$

To refrain from getting confused, label the points.
$(-4,7)$ and $(1,-3)$
$(x_1,y_1)$ and $(x_2,y_2)$

or

$(-4,7)$ and $(1,-3)$
$(x_2,y_2)$ and $(x_1,y_1)$